A 35 kg mass is attached to a pulley by a string and allowed to fall. If pulley has a mass of 2.0 kg and a radius of 0.5 m

A. What is the angular acceleration of the hanging mass?

b. What is the speed of the mass after 3 seconds?

c. How far has it fallen in that time?

An object with mass 45 g is attached to a horizontal spring with spring constant, k = 2.5 N/m, and undergoes simple harmonic motion. At the instant that it is displaced by 25 cm from equilibrium, what is the magnitude of the acceleration?